The Trade-Show Brochure and the Rival's Intervening Article
Your client, Dr. Elena Ruiz, is the sole inventor of a benchtop microfluidic mixer. On March 10, 2024, she distributed a two-page printed brochure at a university trade show and gave a public poster demonstration; the brochure describes the mixer's herringbone channel geometry in text and a photograph. She filed a provisional application on April 1, 2024, but the provisional describes only the mixer housing and omits the herringbone geometry. On August 20, 2024, a rival company published a journal article disclosing the same herringbone geometry. Ruiz now wants to file a nonprovisional application on March 1, 2025, with claims reciting the herringbone geometry. She insists the provisional covers everything and wants to claim priority to it. She has no other filings, and you know of no rival patent application. The client asks whether the March 10 brochure and the August 20 article can be used against her, and whether she can still obtain a patent.
1. Identify the effective filing date for the claims reciting the herringbone geometry and determine whether the March 10 brochure is prior art. Explain the statutory provisions and exceptions.
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The effective filing date for the herringbone-geometry claims is March 1, 2025, not April 1, 2024. Under 35 U.S.C. § 119(e), a nonprovisional is entitled to a provisional's filing date only for subject matter that the provisional describes in compliance with § 112(a). Because the provisional omits the herringbone geometry, the claims reciting it cannot rely on the provisional.
The March 10, 2024 brochure is a printed publication under § 102(a)(1): it was disseminated before the effective filing date and describes the geometry. The next question is the grace-period exception. Section 102(b)(1)(A) provides that a disclosure made one year or less before the effective filing date is not prior art if it was made by the inventor. The interval from March 10, 2024 to March 1, 2025 is 11 months and 19 days, so the brochure falls within the one-year window and is excepted.
The result is date-sensitive: if the nonprovisional is filed after March 10, 2025, the brochure is more than one year before the effective filing date, the exception is unavailable, and the brochure becomes prior art. A second caveat is enablement: a photograph and text describing the geometry likely suffice, but if the brochure does not enable the geometry, the client should not rely on it for the § 102(b)(1)(B) exception discussed below.
2. Determine whether the August 20 rival article is prior art to those claims, and explain how the result changes if the provisional had supported the geometry.
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The August 20, 2024 article is a publication by another before March 1, 2025, so it falls prima facie under § 102(a)(1). The § 102(b)(1)(A) exception does not apply because the rival did not obtain the subject matter from Ruiz. The article is nevertheless excepted under § 102(b)(1)(B): that provision removes from prior art a disclosure whose subject matter had, before that disclosure, been publicly disclosed by the inventor. Ruiz's March 10 brochure publicly disclosed the same herringbone geometry before August 20, and the article is within one year of the March 1, 2025 effective filing date.
The exception is subject-matter limited. If the claims recite features absent from the brochure, such as a specific channel depth, pitch, or manufacturing method, the article remains prior art as to those features. The analysis changes if the provisional had supported the geometry. In that case the effective filing date would be April 1, 2024, and the August 20 article would not be prior art at all because it postdates the effective filing date. The brochure would still be excepted under § 102(b)(1)(A). The practical lesson is that the provisional's omission costs the client the earlier date but does not necessarily forfeit the patent.
3. Recommend a filing strategy, including whether to file a nonprovisional with a priority claim, a continuation-in-part, or a new application, and what risks remain.
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File the nonprovisional no later than March 10, 2025, and preferably well before that date; March 1 is safe but leaves little margin. Claim benefit of the April 1, 2024 provisional under § 119(e) even though the provisional does not support the herringbone claims. The priority claim is not fatal: the herringbone claims simply receive the March 1, 2025 effective filing date, and the provisional still supports any claims limited to the housing.
Include the herringbone geometry in the nonprovisional specification; you cannot add it to the provisional, and the brochure is not part of the application. Do not rely on the brochure as a priority document. If the client needs claims to features first added after March 1, 2025, a continuation-in-part would be required, but that creates a later effective date and exposes those claims to intervening art. Before filing, audit the claims against the brochure: avoid claiming subject matter that appears only in the August 20 article, because the § 102(b)(1)(B) exception will not cover it. Consider a § 1.132 declaration or a statement of the inventor's prior public disclosure only if the examiner challenges the exception; the application should identify the March 10 disclosure in the specification to make the record clear.